Home / 128,735.04-177,621-77,707.44

Finding the Fourth Proportional to 128,735.04, 177,621 and 77,707.44

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Solution

The fourth proportional to 128,735.04, 177,621 and 77,707.44 is: 107,216.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,735.04 : 177,621 = 77,707.44 : x
  2. Step 2: Convert to fraction form
    128,735.04/177,621 = 77,707.44/x
  3. Step 3: Cross multiply
    128,735.04x = 177,621 × 77,707.44
  4. Step 4: Simplify right side
    128,735.04x = 13,802,473,200.24
  5. Step 5: Solve for x
    x = 13,802,473,200.24/128,735.04
  6. Step 6: Final answer
    x = 107,216.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.